collected by ANALYZE.  Also, add some modest amount of intelligence to
guesses that are used for varlena columns in the absence of any ANALYZE
statistics.  The 'width' reported by EXPLAIN is finally something less
than totally bogus for varlena columns ... and, in consequence, hashjoin
estimating should be a little better ...

to their children, leading to misbehavior if they had any children that paid
attention to chgParam (most plan node types don't).  Append's bug has been
there a long time, but nobody had noticed because it used to be difficult
to create a query where an Append would be used below the top level of a
plan; so there were never any parameters getting passed down.  SubqueryScan
is new in 7.1 ... and I'd modeled its behavior on Append :-(

different directory.  This makes dependency tracking work and copes with
compilers that don't suport -c and -o together.

===================
In Notes:
 Refer to CREATE FUNCTION for information on creating aggregate functions.
                                                      ^^^^^^^^^^^^^^^^^^^
I assume it must read C function instead.

In Compatibility SQL/PSM:
 SQL/PSM is a proposed standard.

 We had that before: remove proposed.


drop_index.sgml:
================
<REFNAME>: Removes existing indexes from a database

as far as I can see index should be singular. The command description is
written as if only one index can be removed at a time. Interestingly
enough, in v7.0.2 it was in fact singular. Am I mistaken here?

drop_operator.sgml:
===================
In Outputs the arguments are referred to as type and type2, but the synopsis
and Inputs section these are left_type and right_type, respectively. Also,
oper is used in Outputs versus id in Inputs/Synopsis. In the translation I
follow the replaceables used in the Inputs/Synopsis part.

Frank Wegmann

===================
In Notes:
 Refer to CREATE FUNCTION for information on creating aggregate functions.
                                                      ^^^^^^^^^^^^^^^^^^^
I assume it must read C function instead.

Frank Wegmann

that doesn't actually work.

passed, which occurs when no rows are retrieved by a SELECT.
Mea maxima culpa ... I should have caught this.

set null/default).

> cronjob:
> NOTICE:  RegisterSharedInvalid: SI buffer overflow
> NOTICE:  InvalidateSharedInvalid: cache state reset
> I don't understand what these mean. Should I be concerned about them
> and what do they signify?

No real need to worry.  Those should've been downgraded to DEBUG-level
messages a release or two back, but nobody bothered...

Tom Lane

a separate statement (though it can still be invoked as part of VACUUM, too).
pg_statistic redesigned to be more flexible about what statistics are
stored.  ANALYZE now collects a list of several of the most common values,
not just one, plus a histogram (not just the min and max values).  Random
sampling is used to make the process reasonably fast even on very large
tables.  The number of values and histogram bins collected is now
user-settable via an ALTER TABLE command.

There is more still to do; the new stats are not being used everywhere
they could be in the planner.  But the remaining changes for this project
should be localized, and the behavior is already better than before.

A not-very-related change is that sorting now makes use of btree comparison
routines if it can find one, rather than invoking '<' twice.